212131232131
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COPY OF CALL :::)TRANSCRIPT
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QUEST - Power Coaching for IITJEE
1, Vigyan Vihar, Near Anand Vihar, Delhi – 92. Ph: 55270275, 55278916E-
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16/289, Sector 8, Rohini, Delhi – 85, Ph: 55395439, 30911585 33(b) Source between observer and walln’ =nxvvvs
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+(for direct waves)n’ =s
vvv−x n (for reflected waves)(ii) Source moving away from wall(a) Observer
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between source and walln’ =nxvvvs
+(for direct waves)n’ =s
vvv+x n (for reflected waves)(b) Source be
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tween observer and walln’ =nxvvvs
−(for direct waves)n’ =s
vvv+x n (for reflected waves)(g) Moving T
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arget:(i) S and O stationary at the same place and target approaching with speed un’ =nxuvuv −+or n’ =
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nxvu21 +(for u <<v)(ii) S and O stationary at the same place and target receding with speed un’ =
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nxuvuv +−or n’ =nxvu21 −
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(for u <<v)(h) SONAR: n’ =nxvv2 1nxvvvvsubsubsub
±≅±± (upper sign for approaching submarine while
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lower sign for receding submarine)(i) Transverse Doppler effect: There is no transverse Doppler effect in sound. For velocitycomponent vs
cosθ
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n’=nxcosvvvs
θ±(– sign for approaching and + sign for receding)24. Doppler Effect for light
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(a) Red shift (when light source is moving away):n’ =nxc/v1c/v1+−or λ’ =λ−+xc/v1c/v1 For v << c,
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∆n = –nxcv or ∆λ’ =
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cvxλ (b) Blue shift (when light source is approaching)n’ =nxc/v1c/v1−+
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or λ’ =λ+−xc/v1c/v1 For v << c,∆n =n cv
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or ∆λ’ =– cv
λ
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Call 1600-111-533 (toll-free) for info. Formula Booklet – Physics XI
QUEST - Power Coaching for IITJEE
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1, Vigyan Vihar, Near Anand Vihar, Delhi – 92. Ph: 55270275, 55278916E-16/289, Sector 8, Rohini, Delhi – 85, Ph:
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55395439, 30911585 34(c) Doppler Broadening = 2∆λ= 2 cv
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λ (d) Transverse Doppler effect:For light, n’ =nxcv 211nxcv12222
−=−
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(for v << c)(e) RADAR:∆n
= cv2n
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Call 1600-111-533 (toll-free) for info. Formula Booklet – Physics XI
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QUEST - Power Coaching for IITJEE
1, Vigyan Vihar, Near Anand Vihar, Delhi – 92. Ph: 55270275, 55278916E-16/289, Sector 8,
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Rohini, Delhi – 85, Ph: 55395439, 30911585 35
STUDY TIPS•Combination of Subjects
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Study a combination of subjects during a day i. e. after studying 2–3 hrs of mathematicsshift to any theoretical subject for 2 horrs. When we
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study a subject like math, aparticular part of the brain is working more than rest of the brain. When we shift to atheoretical subject,
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practically the other part of the brain would become active and thepart studying maths will go for rest.•Revision
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Always refresh your memory by revising the matter learned. At the end of the day youmust revise whatever you’ve learnt during that day (or revise the
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previous days workbefore starting studies the next day). On an average brain is able to retain the newlylearned information 80% only for 12 hours, after that the
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forgetting cycle begins. After this revision, now the brain is able to hold the matter for 7 days. So next revision shouldbe after 7 days (sundays could be kept for
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just revision). This ways you will get rid of theproblem of forgetting what you study and save a lot of time in restudying that topic.•
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Use All Your SensesWhatever you read, try to convert that into picture and visualize it.Our eye memory ismany times
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stronger than our ear memory since the nerves connecting brain to eye aremany times stronger than nerves connecting brain to ear. So instead
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of trying to mug upby repeating it loudly try to see it while reapeating (loudly or in your mind). This isapplicable in theoritical subjects. Try to use all your
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senses while learning a subjectmatter. On an average we remember 25% of what we read, 35% of what we hear, 50%of what we say, 75% of what
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we see, 95% of what we read, hear, say and see.•Breathing and RelaxationTake special care of your breathing. Deep
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breaths are very important for relaxing your mind and hence in your concentration. Pranayam can do wonders to your concentration,relaxation and
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sharpening your mined (by supplying oxygen to it). Aerobic exercises likeskipping, jogging, swimming and cycling are also very helpful.
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